Yun Jin's WebLog

I finally finished the long overdued last installment of the Activity Data Model series . In this post, I focused on workflow variables. Conceptually workflow variables are very similar to variables in procedure programming languages like C#. But one...

I'm very happy to annouce that my team just released 2 pack of Activities for WF4 on CodePlex ! · State Machine Activity Pack . State Machine is one of the most common asks for WF4’s Activity Palette, especially for WF3 users. This Activity Pack includes...

Here comes sequal of my WF4 Activity Data Model blog . This post focuses on WF arguments: the Argument class hierarchy which models arguments for WF; how to "declare" an argument for an activity; the automatic reflection; how to deal with dynamic arguments;...

This is my first post about WF4's Activity Data Model . The focus of this post is a high level principle which drives data model redesign between WF3 and WF4: separation of data and program. WF3 has Activity's runtime state stored in the Activity itself...